Home / 2,319.20-3,478.80-933.20

Finding the Fourth Proportional to 2,319.20, 3,478.80 and 933.20

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Solution

The fourth proportional to 2,319.20, 3,478.80 and 933.20 is: 1,399.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,319.20 : 3,478.80 = 933.20 : x
  2. Step 2: Convert to fraction form
    2,319.20/3,478.80 = 933.20/x
  3. Step 3: Cross multiply
    2,319.20x = 3,478.80 × 933.20
  4. Step 4: Simplify right side
    2,319.20x = 3,246,416.16
  5. Step 5: Solve for x
    x = 3,246,416.16/2,319.20
  6. Step 6: Final answer
    x = 1,399.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.